|Timed Petri Net Based Approach for Elevator Group Controls
Young Cheol Cho/Zavarin Gagov/Wook Hyun Kwon
Transaction on Control Automation, and Systems Engineering, vol. 2, no. 2, pp.121-129, 2000
Abstract : In this paper, an optimal group control for elevator systems is proposed with timed Petri net based approach. Elevator system is modeled by timed Petri nets and hall call response times are estimated with moment generating functions (MGFs) method, which is applicable to real traffic patterns. Two assignment policies are proposed to satisfy the demands of passengers (i.e. hall/car calls) and to handle exceptional situations. In addition, optimal algorithms are implemented to minimize cost functions. The performances of the elevator system employing the proposed algorithms are compared with each others in ways of several performance measures by a computer simulation.
Keyword : elevator system, timed Petri nets, moment generating function, hall call response time, optimal group control